The sum of one fifth of a number and three is equal to half the number. What is the number?

Question

 The sum of one fifth of a number and three is equal to half the number. What is the number?

Answer 1

(1/5)(x)+3=(1/2)(x)

3=(1/2)x-(1/5)x

3=(5/10)x-(2/10)x

3=(3/10)x

3=0.3x

30=3x

x=30/3

x=10